Buzzer.



3.1. SCHWARZE.

BUZZER.

APPLICATION FILED AUG-23. 1912.

Patented. Apr. 23, 1918.

' lwoemtoz Carl rf- 5C7? warze GARE 3'. SCHWARZE, OF ADRIAN, MICHIGAN,ASSIGNOR T0 SCI-IVV'ARZE ELECTRIC COM- PANY, 0F ADRIAN, MICHIGAN, ACORPORATION OF MICHIGAN.

BUZZER.

Specification of Letters Patent.

Patented Apr. 23, 1W1.

Application filed August 23, 1917. Serial No. 187,742.

To all whom it may concern:

Be it known that I, CARL J. Sonwanzn, a citizen of the United States ofAmerica, residing at Adrian, in the county of Lenawee and State ofMichigan, have invented certain new and useful Improvements in Buzzers,of which the following is a specification, reference being had thereinto the accompanying drawings.

The invention relates to electrically-operated buzzers and comprises theconstruction as hereinafter set forth.

In the drawings:

Figure 1 is a plan view of the buzzer with the cover of the casingremoved;

Fig. 2 is a longitudinal section through the completed buzzer.

Ais a base formed of pressed sheet-metal having a marginal flange Bextending thereabove and rearward therefrom, terminating in one or morelaterally-extending perforated ears 0 forming the securing meanstherefor. The base A is substantially rectangular in form and isprovided with a depressed panel D cut away at D. E is a Z-shaped memberhaving its central portion secured to said depressed panel, with therearwardly-extending flange E extending through the aperture therein andthe outwardly-extending flange E at one side of said panel. F aremagnetic cores mounted upon the flange E and extending parallel to eachother and the base. G are magnet coils upon the cores. H is anon-magnetic bridge between the outer ends of said cores. I is astriker-bar slidably secured in alined apertures in said flange E andbridge H and extending between the coils G. J is an armature mounted onone end of the bar I, being provided with an outwardly-extending andreturn-bent portion J. K is a resilient vibrator mounted on therearwardly-extending flange E and extending outward through theaperture 1) into the open return bend J. L is an insulated electrodealso mounted on the flange E but insulated therefrom, and K L are 006erating contacts on the members K and M is a cover which is formed ofpressed sheetmetal, being provided with tongues M adapted to be sprunginto engagement with apertures l 2 in the base. The cover M has amarginal. flange, a portion of which extends into proximity to the outerend of the striker I. O are terminal posts mounted upon the base at oneside thereof.

In operation the vibrator K, in cooperation with the electrode L andcontacts K L, will cause the reciprocation of the armature J, which inturn will reciprocate the striker ll, causing a succession of blowsagainst the side of the casing M, which produces the sound.

What I claim as my invention is:

1. An electric buzzer, comprising a base formed of pressed sheet-metalhaving a marginal rearwardly extending flange thereabout terminating inone or more laterallyextending perforated ears forming the securingmeans, said base having a depressed panel, a magnet mounted on saiddepressed panel, an armature for said magnet movable parallel to saidbase, a striker-bar secured to said armature, and a cover for saiddepressed panel and magnet having a marginal flange in proximity to saidstriker-bar, against which the latter is adapted to impinge.

2. An electric buzzer, comprising a base formed of pressed sheet-metalhaving a rearwardly-extending flange thereabout and a depressed panel, amagnet mounted on said depressed panel comprising a Z-shaped memberhaving its central portion secured to said depressed panel, arearWardly-extending flange projecting through an aperture in said paneland an outwardly-extending flange, magnet cores secured to saidoutwardly-extending flange and arranged parallel to each other on saidbase, a non-ma netic bridge member between the outer en s of said cores,a striker-bar slidably secured in alined apertures in saidoutwardly-extending flange and non-magnetic bridge, an armature mountedon said striker-bar, a vibrator mounted on said rearwardly-extendingflange and extending through the aperture in said depressed panel intooperative-relation to said armature, and a cover for said depressedpanel and magnet formed of pressed sheet-metal, being provided withdiametrically opposite tongues for engaging corresponding apertures insaid base, and one side of said cover being in proximity to the end ofsaid striker-bar so as to be struck thereby.

In testimony whereof I aflix my signature.

CARL J. SCHWARZE.

copies of this patent may be obtained for five cents each, by addressingthe "Commissioner ot' Eaten,

Washington, D. C.

